My two cents about Modo.

I've got it since version 201, bought Dan Ablan's manual and studied many tutorials. I really tried to know the program (to make illustrations), but gave up. Why?

Modo has all bell and whistles, has smart falloffs system and a nice OpenGL shading in the viewport.
But you know what? It is cumbersome in simple things; it has too variations on every function and this lead to confusion for the (newbie) user.

In the end I prefer Hexagon: in my opinion is very powerful and way more user friendly, without redundant features.